Flexible joint



FIG. 1 is a front view of a flexible joint;

FIG. 2 is a rear view of the flexible joint;

FIG. 3 is a top plan view of the flexible joint;

FIG. 4 is a bottom plan view of the flexible joint;

FIG. 5 is a left side view of the flexible joint;

FIG. 6 is a right side view of the flexible joint; and,

FIG. 7 is a perspective view of the flexible joint. 

The ornamental design for a flexible joint, as shown and described. 